New York’s Park Slope moms are revered—and reviled—as some of the most doting, kale-eating, baby-signing mothers around. Dominating city sidewalks with their double strollers as they gather in impromptu support groups, these moms are always eager to share parenting advice with anyone who has a Babybjörn and a bewildered expression on her face. With that in mind, we offer Kate Middleton, bearer of the most watched baby bump in the world, the Park Slope mom’s guide to what to expect when you’re expecting . . . again.

On Developing Motor Skills

It’s really difficult when two toddlers are both walking at the same time, so when the little one starts to stand up, gently push him back down.

— Marie-Therese, mom to Ruby, 13On the Decline of Vigilance

With your first, you are so careful about everything; with your second, be prepared to slip into a state of benign neglect.

— Pia, mom to Leo, three, and John, nine monthsOn Managing Mom Guilt

Don’t be too hard on yourself if you can’t get everything you planned to do done in one day. Although, I can’t imagine Kate goes a whole day without showering, like the rest of us.

—Elizabeth, mom to Aiden, five, Kate, three, and William, seven months
The good thing about having more than one is you worry less. With the first, you think things like, What if they die in their sleep? With the second, you simply don’t have time to watch them every second.

When you’re a first-time mom, you never want to let the baby cry; you try to hold them all the time. But with the second, you learn it’s O.K. to let a child cry once in a while, especially if you need some time for yourself— you know, to do things like pee.

Don’t be a helicopter mom. Sibling conflict is O.K.; let the kids figure it out on their own. Sometimes parents forget that sharing is an unnatural thing. But just watch kids at a playground — it’s like . . . National Geographic. They are animals.

— Season, mom to Ruby, four
Expect the two children to fight, especially over food.

— Chantay, mom to Corey, five, and Chiara, 16 monthsOn Figuring It Out

Trust your judgment. When other people — say, the Queen— give you advice, just nod in agreement. When they leave, do whatever you think is best.

— Susan, mom of McKenna, 19 monthsOn the Queen

The Queen is likely going to favor George because one day he’ll have her job, whereas the new baby is kind of irrelevant. So you really want to do things to make sure the little one feels special. Also, make sure to enroll him or her in violin lessons and soccer as early as possible. That can really help with college applications.

— Natalie, mom to Levon and Alec, threeOn Tempering Tantrums

Pick your battles. If you have a daughter and she wants to wear her rainbow tutu and leopard tights and a boa and headband and rain boots, just let it go.

— Gina, mom to Lola, four, and Michela, 10 months
When both of the kids are freaking out, the best way to deal with it is to leave. I don’t mean leave them alone. Make sure they’re with someone, then go get a pedicure.

— Mierav, mom to Zoey, 4, and Riley, 10 monthsOn the Help

I believe strongly in sleep training the kids, it helps everyone sleep better. So Kate, tell the night nurse to sleep train the kids.

— Elizabeth, mom to Steven, six, and Jackson, two

In our global economy, it’s important to make sure all the nannies are fluent in Mandarin or Cantonese, preferably both.

— Sandra, mom to Alana, 12On Fun Activities

If you smoke a little pot, you can get really excited about getting down on the floor and doing a puzzle, or reading the same book over and over again. Of course, you need to be responsible about it. As long as you know what to do if one of the kids is choking, you’re O.K.